Actor Jack Wagner, left, stands with Dallas Cowboys quarterback Tony Romo, who he held off in the final round of the American Century Celebrity Golf Championship, Sunday, July 17, 2011 at the Edgewood Tahoe Golf Course in Stateline, Nev. Wagner is the only non-professional athlete to have won the tourney in its 22 years.

Photo: Doug Etten, AP

Actor Jack Wagner, left, stands with Dallas Cowboys quarterback...

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Northern Ireland's Darren Clarke holds the Claret Jug trophy as he celebrates winning the British Open Golf Championship at Royal St George's golf course Sandwich, England, Sunday, July 17, 2011.

Even actor Jack Wagner's 91-year-old mother was focused on Tony Romo as Wagner and the Dallas Cowboys' quarterback played the final round of the American Century Celebrity Golf Championship at Lake Tahoe.

Wagner, the only non-professional athlete to have won the tourney in its 22 years, did it again Sunday, holding off the late-charging Romo.

Wagner, who described himself earlier in the week as a "pip-squeak" actor trying to keep up with the big hitters, said he telephoned his mother before Sunday's round and all she wanted to talk about was Romo. "I'm like, 'Mom, Mom, we're only concerned about Jack today. We can't control Tony,' " Wagner said.

Wagner birdied his first two holes and five of the first eight to open up a 10-point lead that appeared to be insurmountable in the modified Stableford scoring format that puts a premium on eagles and birdies.

Wagner then bogeyed three of his next six while Romo drove the green and eagled the 315-yard 11th, then birdied the 13th to cut the margin to two.

Both hit inside 15 feet on the par-3 17th, but Romo missed his birdie attempt. Wagner made his. Romo followed Wagner into the pond on the 18th, then made par. Wagner saved bogey to win 80-77.

"Jack deserves all the credit here," Romo said. "He really went out there and won the golf tournament."

The Stableford system awards six points for eagle, three for birdie, one for par, none for bogey and minus-2 for double bogey or worse.

Romo shot a 66 in a regular format. Wagner had a 69.

PGA Tour: Chris Kirk picked up his first PGA Tour title with a one-stroke victory in the Viking Classic in Madison, Miss., shooting a 4-under-par 68 to beat Tom Pernice Jr. and George McNeill by one stroke.